Seam-lock for tubes.



w. H, MON'iITT. QEAMXQUUK FOB TUBES. .arrmouxbjprnnn JULY 3, 19 07 Patented Jfi1 12,1910.

G06 0 0 0 O Q 0 0 O O OOOOODOOOQOO a D a n a a a :3 393093933) u o c a o c 000 00000000 0 0O uo 0 0 o o o o 0000000000 00 0 'Withes es I Inventor Wm. H. M I/aft. 7 .By his Artorae};

' UNITED STATES PATENT onerou- WILLIAM H. MpNUTT. OF NEW YORK. N. Y.. ASSIGNOR. BY MESNE ASSIGNMENTS, TO

THE MCNUT'I. NON-EXPLOSIVE MFG. so, on NEW Yosx, N.

SEAM-LOCK FOB TUBES.

seams.

Specification of Letters Patent. Patented J uly 12, 1910.

Application filed July 3, 1907. Serial No. 382,125.

connection with vessels of variouskinds tor containing gasolene, kerosene, and similar inflammable and explosive liquids.

One of the objects of the invention is to provide a form of scam lock for a perforated tube, that can be very economically and quickly manufactured, yet. Willbe sullicient-ly strong and reliable, to hold the tube against rupture from internal pressure.

In the accompanying drawing represent ing embodiments of my invention Figurel is a vertical sectionqlhrougha portionof a vessel having thesafcty tube applied thereto. Fig. 2 shows in section the seam lock in the first stage of manufacture. Fig. 3 shows the locking strip. Fig. 4 is across section through the tube shoyving the finished seam lock. Fig. 5 is aview from the lou enend'. Fig. 6 shows the end closure; and Figs. 'T'and 8 show a modified form of. seam lock. i

Where. tubes are formed of perforatedmaterial. they cannot be economically drawn and then perforated, butlnust be'ma'de 'ofperforated; sheet; material and then bent to a tg-ibulg r form. and, finished by using a seam lock of some kind; With safety devices for use with explosive fluids, "the seam. lock ca ion" a bkin" sea i 1. the presen ded with eliannles str p. is use thes Prow I iess e bm see -2.1mm za'f e'tu hq d ot be. soldere or brQzeddS't-hsfh E "o1 flammable ,rnaterial would loosen such "a I Y s ds? pr sur o. n ea forated When in the sheet or flat form and is preferably of a hardened imetal, such as hard brass.

The seam lock shown in Fig. 3 is prefer ably of comparatively soft material'such as' soft-brass and is alsofoi'nied "ofperforated sheet material. This'strip 12 has its" longitudinal edges 13 and 14'doubledtwice upon themselves by a substantially 'S-shaped bend as illustrated, forming channels 15 and 16 opening in oppositedirections'. This locking strip is slipped on the open tube!) in the manner shown in Fig. 2 with the edges and 11 projecting into the channels and 16' respectively. Thereupon by"suitable pressing means the channels, and in fact the whole locking strip is compressed't-o the form illustrated in Fig. 4, whereby the than nels 15 and 16, are closed on the margins 10 and 11 of the tube, a-nd'the other bends adjacent the straight intermediate portion 17 of the locking strip are a lsoben't' upon "themseli es. The locking strip being of soft material will readil'y permitofsuch compression or bending, and the-material or the strip will extend to the openings injthe hardened sheet of 'r'naterial' 9, thereby forin ing a tight-*engagenieiit the tfube' ed es by the locking'strip; "The locking strip eing also ofpenfoiated niateri'al,"wil'l;act as a safety devicefon prinei le'ofthe Davy safety lamp, per nitiling'ipassage ofi'apor'or ga -s tlier etln'ou'gh' bht preventing. back his of flame "or ignited" gas in' the welhknown' manner. i A modified form of seamlock is shown in Figs 7. and Sin" which the tube 20 has its d sil id 22 ben P 1 9 h el es" E e; locking strip 23 1 'a;itsed es2' andf25 bent upon themselifes'to: form clr toward itll other; into' wl t lfij fip fth 'm e "T a l- '5 t llll c mpress'edl 'ethe form v own -in Eig. g are o -ea t ans-flame very oerforations" inthe gb d-inannerfl the end" projecting Extend,

has a threaded bore 38.

on said shoulder.

the Han e projecting outward, so that the edges 0 the tube and flange are brought ad acent. Thereupon the said meeting edges are'given bends extending inwardly in the 5 form of inter-fitting indentations 33 at the lower edges. l I

The top 35 of the vessel has an aperture 36 inwhich is secured a suitable closure member denoted generally by 37, and which This bore is also provided with a shoulder portion iltjlwlow which the bore is of reduced diameter, snugly fitting' the tube T. This end of the tube is provided with an external flange resting A ring nut 'lal is screwed into thethreaded bore 38 onto said flange,

looking it securely agaii'ist said shoulden;

=By" this means the tube will have its seam tightly locked at the ll1)pCl,1')()liLl()l1 and so- 20 c urely prevented from being distended, and

the locking strip will be secured also by the 1 ring nut. Having thus described my invention, I claim:

l iibn eolnbination a satety tubetormcd' of apertured sheet material of c yliud i'ieal sha pa with" theilongitudinal edges separated, and i'a-loe'king strip of apertnrc'd material formed with'its longitudinal edges bent to form channel portions opening in opposite directions, the channel portions having the meeting edges of the tubular partextending therein and secured'by the opposite sides of the channel port-ions being compressed thereon, an end member for said tube comprising a disk havinga tubular flange portion engaging the inner wall of the tube, said tubular wallsof the members having inwardly extending intertitting indentations at the lower edges. 1

2. In combination a safety tube of apertiured sheet material of cylindrical shape with the edges separated, and a locking strip having its longitudinal edges each bent to form a longitudinal channel, the longitudinal edges o'f-the tube at the seam beingrnr bedded in said channels respectively and secured therein by the compression of the opposite walls of the channel, and an end member for said tube comprising a disk having a tubular tlange portion engaging the inner wall of the'tuhe, said tubular walls of the members having inwardly extending interlittiug indentations at the lower edges.

\VILLl \M ll. .MoNUTI \Vitnesses:

Finch. J. Donn, 111mm 1. Gnenxwoon. 

